Hi Qun-Wei On Fri, Mar 07, 2025 at 08:01:02PM +0800, Qun-Wei Lin wrote: > This patch series introduces a new mechanism called kcompressd to > improve the efficiency of memory reclaiming in the operating system. The > main goal is to separate the tasks of page scanning and page compression > into distinct processes or threads, thereby reducing the load on the > kswapd thread and enhancing overall system performance under high memory > pressure conditions. > > Problem: > In the current system, the kswapd thread is responsible for both > scanning the LRU pages and compressing pages into the ZRAM. This > combined responsibility can lead to significant performance bottlenecks, > especially under high memory pressure. The kswapd thread becomes a > single point of contention, causing delays in memory reclaiming and > overall system performance degradation. Isn't it general problem if backend for swap is slow(but synchronous)? I think zram need to support asynchrnous IO(can do introduce multiple threads to compress batched pages) and doesn't declare it's synchrnous device for the case.
